JP2023548688A - Battery protection methods and systems - Google Patents

Abstract

The present invention relates to a battery protection method and system that maintains the existing protective operation/release conditions and performs the protective operation based on the possibility of safety issues such as ignition/heat generation occurring. 1. Methods to further implement protection algorithms corresponding to each segment, and to prevent overcharging of a particular battery bank by checking whether overvoltage has occurred in a particular battery bank before reaching the cell unbalance protection operating condition. The present invention relates to a method and system for protecting a battery by taking the next step and permanently cutting off battery operation to prevent safety problems in the event that overvoltage continues to occur in the battery bank even after the first step.

Description

The present invention relates to a battery protection method and system, and more particularly, after the battery protection operation occurs, an additional algorithm regarding the release of the protection operation (battery reuse) is implemented to prevent the battery from simply malfunctioning and to ensure safety. The present invention relates to a method and system for protecting batteries by preventing safety issues.

Batteries are widely used not only in the field of small electronic devices such as smartphones, notebook computers, and tablet PCs, but also in a wide variety of fields, including electric vehicles and energy storage systems (ESS).

However, while this type of battery is efficient and convenient and can be used in a wide variety of fields, due to its high energy density, it poses the risk of catching fire if it overheats for some reason. In particular, the recent rapid increase in battery fire accidents is eye-opening, and as a result of this, there is a growing sense of anxiety in the battery market itself, and ensuring improved battery safety is being taken up as an important issue. There is.

As a means to ensure battery safety, a battery protection circuit is used to protect batteries from overcharging, overdischarging, overcurrent, and short circuits. In general, when a battery protection circuit detects abnormal charging/discharging, short circuit, over temperature, etc. in addition to the set value, it generates the protective operation and takes abnormal measures. After the protection is removed, if the state of the battery satisfies a preset release condition, the protective operation is canceled to allow the battery to operate normally.

On the other hand, although the battery status is actually normal, a protective operation may occur due to abnormal noise that occurs when the battery communicates with or connects with an external system, or the set value may change. Scenes frequently occur where changes are accepted as malfunctioning.

However, when a conventional protection operation such as overcharging, overdischarge, short circuit, or overheating is detected and the preset release conditions are met, the above protection operation is canceled and the battery returns to normal mode. This method has difficulty in protecting the battery from simple battery malfunction. Such conventional techniques are disclosed in the following patent documents.

Japanese Patent Publication No. 2010-259125 Republic of Korea Patent Publication No. 10-2021-0033295

The present invention was devised to solve the above-mentioned disadvantages, and by supplementing the reuse conditions for simple battery malfunctions and reinforcing the protective operation against safety issues, The objective is to provide a method and system that can ensure battery safety.

Another object of the present invention is to provide a method and system that can ensure battery safety by preventing overuse of a particular battery bank due to voltage imbalance between battery banks.

A battery protection method according to an embodiment of the present invention includes a state data measuring step of measuring battery state data at regular intervals, and using the battery state data measured in the state data measuring step, a protective operation generating step of determining whether or not the state of the battery satisfies a protective operation generating condition set in advance for each protective operation item of each battery, and causing a battery protective operation of the item determined to be satisfied; Using the battery state data measured after the battery protection operation of at least one item occurs in the protection operation generation step, it is determined whether or not a preset protection operation release condition for the item that has occurred is satisfied. A protective operation canceling step for canceling the protective operation that has occurred and allowing the battery to operate in a normal operation mode if the determination is satisfied, and a category to which the item of the protective operation that occurred in the protective operation generating step belongs. It is determined whether the occurrence state of the protective operation satisfies the abnormality measure sufficiency conditions corresponding to the classified category, and if it is determined that the condition is satisfied, the predetermined abnormality corresponding to the category is determined. and an abnormal action step of taking action.

Specifically, the abnormality action step includes a classification step of classifying to which category of the first or second category the item of the protective action that occurred in the protective action generating step belongs; After classifying the category to which the item of the protective action that has occurred belongs, a step of determining whether or not the abnormal action is satisfied, which determines whether the occurrence state of the protective action that has occurred satisfies the abnormal action sufficiency condition corresponding to the classified category. and an abnormal action step of taking a predetermined abnormal action corresponding to the category if it is determined that the abnormal action is satisfied as a result of the determination in the step of determining whether or not the abnormal action is satisfied.

On the other hand, in the step of determining whether or not abnormal measures are satisfied, if the item of the protective operation that has occurred belongs to the first category, the number of times that the protective operation of the item has occurred up to the current cycle is equal to or greater than the first reference number of times. If the number of occurrences is equal to or greater than the first standard number of occurrences, it is determined that the abnormality measure sufficiency condition corresponding to the first category is satisfied; When the item of the protective action that has occurred belongs to the second category, an occurrence frequency comparison step of comparing whether the number of times that the protective action of the item has occurred up to the current cycle is equal to or greater than a first reference number of times; and the step of confirming whether or not the occurrence of the protective operation continues for a reference time or longer, and the number of occurrences is equal to or more than the first reference number of times, and the occurrence state of the protective operation is confirmed. The present invention is characterized in that it is determined that the abnormality measure satisfaction condition corresponding to the second category is satisfied if the condition continues for a reference time or longer.

On the other hand, in the abnormality action step, when it is determined that the item of the protective action that has occurred satisfies the abnormality action sufficiency condition corresponding to the first category, providing a notification alarm that provides a notification alert for battery status confirmation. and a control value initialization step of initializing the battery control value currently set in the memory to the initial battery control value, and the abnormality measure satisfaction condition that the item of the protective operation that has occurred corresponds to the second category is performed. If it is determined that the above conditions are satisfied, a control value initialization step is performed to initialize the battery control value currently set in the memory to an initial battery control value.

On the other hand, in the battery protection method, after performing the notification alarm providing step and the control value initialization step in the abnormality action step, if the same protection action occurs more than a second reference number of times, the battery is protected. It further includes an additional abnormal action step of permanently shutting down the operation.

On the other hand, the first category is a category to which items of protective operation that may manifest as safety issues including heat generation and ignition belong, and the second category is a category to which items of protective operation that may manifest as safety issues including heat generation and ignition belong. This category is characterized by belonging to items of protective operation that are unlikely to manifest as safety issues, including safety issues.

A battery protection method according to another embodiment of the present invention includes a state data measuring step of measuring state data of a battery including at least two or more battery banks at regular intervals, and a step of measuring state data in the state data measuring step. Based on the battery status data, the voltage of each battery bank being charged is compared to see if it satisfies a preset overvoltage protection operation generation condition, and the overvoltage protection operation is performed for the battery bank that satisfies the condition. a step of generating a battery protection operation; and a voltage between the battery bank in which the overvoltage protection operation occurred in the step of generating the battery protection operation and the battery bank having the lowest voltage compared to the battery bank in which the overvoltage protection operation occurred. A bank voltage difference calculation step for calculating a voltage difference is compared with whether or not the voltage difference calculated in the bank voltage difference calculation step is within a predetermined reference voltage difference range. a notification alarm issuing step of issuing a status confirmation notification alarm for the battery bank in which an overvoltage protection operation has occurred; If it continues to occur, the buffer voltage value currently set for the battery bank is increased by a predetermined reference voltage value, or the buffer voltage value currently set is and adjusting the buffer voltage downward by a predetermined percentage (%) of the buffer voltage.

Meanwhile, the battery protection method includes, after adjusting the buffer voltage downward through the buffer voltage downward adjustment step, checking whether the overvoltage protection operation continues to occur in the battery bank for more than a second reference number of times. The method further includes a step of permanently shutting off battery operation when the battery is turned off.

Here, the range of the predetermined reference voltage difference is set to be greater than or equal to the first reference voltage difference, but less than the second reference voltage difference.

Specifically, the first reference voltage difference may be a value equivalent to 80% of the second reference voltage difference, and the second reference voltage difference may be a value corresponding to 80% of the second reference voltage difference. It is characterized by a value corresponding to a judgment standard.

A battery protection system according to an embodiment of the present invention includes a state data measurement section that measures battery state data at regular intervals, and the battery state data measured by the state data measurement section. a battery protection operation generation unit that determines whether or not the state of the battery satisfies a protection operation generation condition set in advance for each protection operation item, and causes a battery protection operation for the item that is determined to be satisfied; Using battery status data measured after the battery protection operation generation unit generates a protection operation for at least one item, it is determined whether or not a preset protection operation cancellation condition for the item is satisfied. , a battery protection operation canceling section that cancels the battery protection operation of the item that has occurred, and a category to which the battery protection operation item that occurred in the battery protection operation generation section belongs, and determining the occurrence of the protection operation. an abnormal action sufficiency condition comparison/judgment unit that compares and determines whether or not the state satisfies the abnormal action sufficiency conditions corresponding to the classified categories; and as a result of the judgment in the abnormal action sufficiency condition comparison/judgment unit, the battery protection operation is performed. and an abnormality handling section that takes predetermined abnormality measures corresponding to the classified category when it is determined that the occurrence state satisfies the abnormality measure sufficiency condition corresponding to the classified category.

Specifically, the abnormal action sufficiency condition comparison/judgment section classifies whether the item of the protective operation occurring in the battery protective operation generating section belongs to a preset first category or a second category. , a protective operation item classification unit that outputs a first or second classification signal, and if one of the first and second classification signals is output from the protection operation item classification unit, an occurrence number comparison unit that compares whether or not the number of times the protection operation has occurred for the item up to the current cycle is equal to or greater than a first reference number of times, and outputs a number sufficiency signal when the number of times the protection operation has occurred for the item is equal to or greater than a first reference number; When the second classification signal is output from the operation item classification unit, it is compared whether the occurrence state of the protective operation of the item lasts for a reference time or more, and if it is longer than the reference time, a duration sufficiency signal is output. and an occurrence duration comparison section.

On the other hand, the abnormality handling unit issues a notification alarm for battery status confirmation when the number of occurrences comparison unit outputs a sufficient number of occurrences signal while the first classification signal is outputted from the protective operation item classification unit. In a state where the first classification signal is output from the provided status confirmation notification section and the protective operation item classification section, the occurrence count comparison section outputs a count sufficiency signal, or the protective operation item classification section In the state where the second classification signal is output from the , when the number of occurrences comparator outputs the number of occurrences sufficiency signal and the occurrence duration comparator outputs the duration sufficiency signal, the number of occurrences currently set in the memory is determined. The battery control device is characterized by comprising a control value initialization section that initializes the battery control value to an initial battery control value.

On the other hand, the occurrence frequency comparison unit determines whether the number of times the protective operation for the item occurs is equal to or greater than a second reference number of times after the battery status confirmation alarm is provided by the status confirmation alarm unit of the abnormality handling unit. The present invention is characterized in that it compares the number of times and outputs an additional number of sufficiency signal if the number is greater than or equal to the number of times.

For this reason, the abnormality handling section further includes an operation cutoff section that permanently cuts off the operation of the battery when the additional number of occurrences sufficiency signal is output from the number of occurrence comparison section.

On the other hand, the first category is a category to which items of protective operation that may manifest as safety issues including heat generation and ignition belong, and the second category is a category to which items of protective operation that may manifest as safety issues including heat generation and ignition belong. This category is characterized by belonging to items of protective operation that are unlikely to manifest as safety issues, including safety issues.

A battery protection system according to another embodiment of the present invention includes a state data measurement unit that measures state data of a battery including at least two or more battery banks at regular intervals; A battery protection operation that compares whether or not the voltage of each battery bank satisfies a preset overvoltage protection operation generation condition based on the battery status data stored, and causes an overvoltage protection operation on the battery banks that satisfy the condition. A voltage difference between a battery bank in which an overvoltage protection operation has occurred and a battery bank having a lowest voltage compared to the battery bank in which an overvoltage protection operation has occurred is determined by a battery bank in which an overvoltage protection operation has occurred by the battery protection operation generation unit. An abnormality measure sufficiency condition for comparing whether or not the difference is within a predetermined reference voltage difference range, and determining whether or not the battery bank in which the overvoltage protection operation has occurred satisfies the abnormality measure sufficiency condition if it is within a predetermined reference voltage difference range. The apparatus includes a comparison determination section, and an abnormality treatment section configured to take a corresponding predetermined abnormality treatment if it is determined that the abnormality measure sufficiency condition is satisfied as a result of the determination in the comparison and determination section.

Meanwhile, in the battery protection system, the voltage of the battery bank is preset based on battery status data measured after the overvoltage protection operation occurs in at least one battery bank by the battery protection operation generation unit. The battery protection operation canceling unit compares whether or not the specified protection operation cancellation conditions are satisfied, and if the conditions are satisfied, cancels the protection operation that has occurred in the battery bank.

On the other hand, the abnormality measure sufficiency condition comparison and determination section determines that a voltage difference between the battery bank in which the overvoltage protection operation has occurred and a battery bank having the lowest voltage compared to the battery bank in which the overvoltage protection operation has occurred is a predetermined reference voltage. A reference voltage difference range comparison section compares whether or not the voltage falls within the range of the difference, and outputs a difference condition satisfaction signal when the difference falls within the range, and a difference condition satisfaction signal is output from the reference voltage difference range comparison section. After that, it is compared whether the number of times that the overvoltage protection operation continues to occur in the battery bank where the overvoltage protection operation has occurred is equal to or greater than a first reference number of times, and if the number of occurrences is equal to or greater than the first reference number of times, the number of occurrences is outputted as a number of occurrences sufficiency signal. It is characterized by comprising a comparison section.

On the other hand, when the reference voltage difference range comparison unit outputs a difference condition satisfaction signal, the abnormality handling unit includes a status confirmation notification unit that provides a battery status confirmation alarm when the reference voltage difference range comparison unit outputs a battery status confirmation alarm, and a number sufficiency signal from the occurrence count comparison unit. The present invention is characterized by comprising a buffer voltage adjusting section that adjusts the buffer voltage value currently set for the battery bank downward by a predetermined reference voltage value when the battery bank is outputted.

On the other hand, the occurrence number comparison unit compares whether the number of times the overvoltage protection operation continues to occur in the battery bank after the downward adjustment of the buffer voltage in the buffer voltage adjustment unit is equal to or more than a second reference number, The present invention is characterized in that an additional number of times sufficiency signal is output when the number of times is equal to or more than that.

For this reason, the abnormality measure unit further includes an operation cutoff unit that takes an additional abnormality measure to permanently cut off the operation of the battery when the additional number of occurrences sufficiency signal is output from the occurrence count comparison unit.

On the other hand, the range of the predetermined reference voltage difference is set to be greater than or equal to the first reference voltage difference, but less than the second reference voltage difference.

Specifically, the first reference voltage difference may be a value equivalent to 80% of the second reference voltage difference, and the second reference voltage difference may be a value corresponding to 80% of the second reference voltage difference. It is characterized by a value corresponding to a judgment standard.

The present invention supplements the reuse conditions for simple battery malfunctions, and also reinforces the protective operation against safety issues such as fire and heat generation, thereby preventing them from becoming a safety issue. By preventing this, battery safety can be improved.

1 is a diagram showing a battery protection method according to Embodiment 1 of the present invention. FIG. FIG. 7 is a diagram showing a battery protection method according to Embodiment 2 of the present invention. FIG. 1 is a diagram showing a battery protection system according to Embodiment 1 of the present invention. FIG. 3 is a diagram showing a battery protection system according to Embodiment 2 of the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail based on the accompanying drawings so that a person having ordinary knowledge in the technical field to which the present invention pertains can easily carry out the implementation. However, the present invention can be embodied in various different forms and is not limited to the embodiments described herein. In the drawings, in order to clearly explain the present invention, parts unrelated to the explanation are omitted, and similar parts are given similar drawing symbols throughout the specification.

Hereinafter, the present invention will be explained in detail based on the accompanying drawings.

1. Terms used in the present invention

1.1. Battery protection operation items

Battery protection operation items refer to the commonly known types of battery protection operations that operate to protect the battery from abnormal charging/discharging, short circuits, overtemperature, etc. do.

The battery protection operation items include overvoltage protection (OVP), undervoltage protection (UVP), discharge overcurrent protection (DOCP), and charging. Overcurrent protection (COCP: Charge Over Current Protection), Discharge Over Temperature Protection (DOTP), Discharge Under Temperature Protection (DUTP) n), Charge Over Temperature Protection (COTP), Charge Under Temperature Protection (CUTP) : Charge Under Temperature Protection, Short circuit Protection, Cell imbalance Protection, FET error protection tection).

1.2. First and second category

In the present invention, among the above-mentioned battery protection operation items, items that are likely to manifest as safety issues such as fire and heat generation are placed in the first category, and items that are not. It is divided and set in the second category.

The first category includes items that may manifest as safety issues among battery protection operation items, such as overvoltage protection (OVP) and overcharging. This includes charge over current protection (COCP), cell imbalance protection, and FET error protection.

The second category includes items that are unlikely to manifest as safety issues among battery protection operation items, such as under voltage protection (UVP), discharge, etc. Discharge Over Current Protection (DOCP), Discharge Over Temperature Protection (DOTP), Discharge Under Temperature Protection (DUTP) Charge Over Temperature Protection (COTP) , Charge Under Temperature Protection (CUTP), and Short Circuit Protection belong here.

1.3. status data

The battery status data measured in the present invention includes the voltage and current of each battery cell, the current of the shunt resistor, the voltage across the shunt resistor, and the temperature value of the thermistor. You can stay there.

Using such state data, it is determined whether or not the battery protection operation for each item is to occur/cancelled, using a known technique for each item of protection operation.

For example, in the case of overvoltage/undervoltage/overcurrent/undercurrent protection operation, the presence or absence of occurrence is determined by comparing whether the measured voltage/current value is above/below the respective set reference value. Good too. In the case of FET error protection operation, if it is confirmed that the current value of the shunt resistor is higher than the set reference value even though the charge/discharge field effect transistor (FET) is turned off, it is determined that an error has occurred. Good too. In the case of over-temperature/low-temperature protection operation, whether or not the over-temperature/under-temperature occurrence has occurred may be determined by comparing whether the measured thermistor temperature values are above/below respective set reference values. In the case of short circuit protection operation, the presence or absence of occurrence may be determined using the voltage value applied across the shunt resistor and the shunt resistance value.

2. Battery protection method according to the present invention

The method of protecting a battery according to the present invention consists of two types of embodiments.

<Embodiment 1: Method of protecting the battery by taking abnormal measures according to the items of battery protection operation>

FIG. 1 is a diagram showing a battery protection method according to Embodiment 1 of the present invention.

Referring to FIG. 1, in the first embodiment, each battery protection operation item is divided into two categories depending on whether or not there is a possibility that a safety issue will materialize, and the occurrence state of the protection operation is classified into two categories. Depending on whether or not the conditions corresponding to the classified categories are met, abnormal measures are taken to compensate for simple battery malfunctions due to noise etc., even though they are actually normal, and to prevent safety issues. The battery is configured to be protected in a manner that prevents the occurrence of (safety issues) in advance.

2.1. Status data measurement step (S100)

The state data measuring step (S100) is a step of measuring battery state data at regular intervals.

2.2. Protective operation generation step (S200)

The protective operation generation step (S200) uses the battery status data measured in the status data measuring step (S100) to determine the battery protection operation generation conditions, which are preset for each battery protection operation item. In this step, it is determined whether or not the conditions are satisfied, and a battery protection operation is performed for the items determined to be satisfied.

2.3. Protective operation release step (S300)

The protection operation canceling step (S300) uses the battery state data measured after at least one item of battery protection operation occurs in the protection operation generation step (S200) to determine the preset state of the battery that has occurred. This step is a step of determining whether or not the battery protection operation release condition of the item is satisfied, and if the condition is satisfied, the battery protection operation that has occurred is canceled so that the battery operates in a normal operation mode. The method for determining whether or not the protective operation that has occurred is canceled also uses a known technique.

2.4. Abnormal action step (S400)

The abnormality measure step (S400) classifies the category to which the item of the battery protection operation that occurred in the protection operation generation step (S200) belongs, and determines whether the abnormality measure corresponding to the classified category is satisfied by the occurrence state of the battery protection operation. This is a step of determining whether or not the conditions are satisfied, and if it is determined that the conditions are satisfied, taking predetermined abnormality measures corresponding to the category.

Such an abnormality handling step (S400) includes the following detailed steps.

2.4.1. Classification step (S410)

First, a classification step (S410) is performed to determine whether the battery protection action item generated in the protection action generation step (S200) belongs to a first category or a second category.

Here, as mentioned above, the first category is the category to which items of protective operation that may manifest as safety-related issues such as heat generation and ignition belong, and the second category This category includes protective operation items that are unlikely to manifest as safety-related issues such as heat generation and ignition.

2.4.2. Step for determining whether abnormal measures are satisfied (S420)

In the step (S420) for determining whether abnormal measures are satisfied, after classifying the category to which the item of the battery protection operation that has occurred is classified in the classification step (S410), the state of occurrence of the battery protection operation that has occurred falls into the classified category. This is a step of determining whether or not the corresponding abnormality measure sufficiency conditions are satisfied.

Specifically, when the item of the battery protection operation that has occurred belongs to the first category, it is determined whether the cumulative number of times that the battery protection operation of the item has occurred up to the current cycle is equal to or greater than the first reference number of times. A step of comparing the number of occurrences to be compared (S422-A) is performed. If the cumulative number of occurrences is equal to or greater than the first reference number, it is determined that the abnormality measure satisfaction condition corresponding to the first category is satisfied.

If the cumulative number of occurrences, that is, the number of times the battery protection operation for the same item has occurred, is less than the first standard number of times, the battery will be activated normally depending on whether the battery protection operation release condition for the item is satisfied. No additional abnormal measures will be taken to ensure operation.

On the other hand, if the item of the battery protection operation that has occurred belongs to the second category, a comparison is made to see whether the cumulative number of times that the battery protection operation of the item has occurred up to the current cycle is equal to or greater than the first reference number of times. A frequency comparison step (S422-B) and a continuous occurrence confirmation step (S424) of confirming whether the state in which the battery protection operation has occurred continues for a reference time or longer are performed. If the cumulative number of occurrences, that is, the number of times the battery protection operation for the same item has occurred is equal to or greater than the first reference number, and the state in which the protection action has occurred continues for more than the reference time, it falls into the second category. It is determined that the conditions for satisfying abnormal measures corresponding to the above are satisfied.

Here, the first reference number of times may be set to, for example, three times, and the reference time may be set to, for example, 10 minutes.

2.4.3. Abnormal action operation step (S430)

The abnormality measure operation step (S430) is a step in which a predetermined abnormality measure corresponding to the category is taken when it is determined that the abnormality measure is satisfied as a result of the judgment in the abnormality measure sufficiency determination step (S420). In this embodiment, the predetermined abnormal measures may include measures to issue a status confirmation alarm, which will be described later, and measures to initialize a battery control value, and further include abnormal measures to cut off battery operation.

Specifically, when it is determined that the item of the battery protection operation that has occurred satisfies the abnormality measure sufficiency condition corresponding to the first category, a notification alarm providing step of providing a status confirmation notification alert to notify confirmation of the battery status. (S432-A) and a control value initialization step (S434-A) of initializing the battery control value currently set in the memory (for example, RAM) to the initial battery control value.

On the other hand, if it is determined that the item of the battery protection operation that occurred satisfies the abnormality measure sufficiency conditions corresponding to the second category, the battery control value currently set in the memory (RAM) is changed to the initial battery control value. A control value initialization step (S434-B) is performed.

Here, initializing the memory setting values may be realized, for example, by reading a value from a read-only memory (ROM) and writing it to a random access memory (RAM).

2.4.4. Additional abnormality action step (S440)

The additional abnormality measure operation step (S440) is performed when, after taking the abnormality measure corresponding to the first category in the abnormality measure operation step (S430), the battery protection operation of the same item occurs more than a second standard number of times. take additional abnormal measures to permanently interrupt battery operation.

In the case of the battery protection operation of the item belonging to the first category, a notification alarm for battery status confirmation is provided through the abnormality action operation step (S430), and even if the first abnormality action of initializing the memory is taken. Regardless, if the battery protection operation of the same item continues to be performed repeatedly, it will cause battery deterioration, so in order to interrupt this in advance, if the battery protection operation occurs a second standard number of times, the battery operation will be permanently disabled. It cuts it off.

Here, the second reference number of times may be set to, for example, two times.

<Embodiment 2: Method of protecting the battery by taking abnormal measures before cell unbalance protection operation occurs>

FIG. 2 is a diagram showing a battery protection method according to Embodiment 2 of the present invention.

Referring to FIG. 2, in the second embodiment, when an overvoltage protection operation occurs in a specific battery bank, if the voltage difference between the battery bank and the battery bank with the lowest voltage satisfies the reference condition, an abnormality is detected. As a measure, we will first provide battery status confirmation notification and lower the buffer voltage to prevent overcharging of the battery bank, and if the overvoltage protection operation continues to occur in the battery bank, The battery is configured to be protected by taking secondary measures to permanently cut off battery operation to prevent safety issues from arising.

2.1. Status data measurement step (S1000)

The state data measuring step (S1000) is a step of measuring battery state data at regular intervals.

2.2. Battery protection operation generation step (S2000)

The battery protection operation generation step (S2000) is performed based on the battery status data measured in the status data measurement step (S1000), in which the voltage of each battery bank being charged satisfies preset overvoltage protection operation generation conditions. The battery bank is then compared to cause overvoltage protection operation for a full battery bank.

2.3. Bank voltage difference calculation step (S3000)

The bank voltage difference calculation step (S3000) has the lowest voltage compared to the battery bank in which the overvoltage protection operation occurred in the battery protection operation generation step (S2000) and the battery bank in which the overvoltage protection operation occurred. This step is to calculate the voltage difference between the battery bank and the battery bank.

2.4. Information alarm issuing step (S4000)

The notification alarm issuing step (S4000) compares whether the voltage difference calculated in the bank voltage difference calculation step (S3000) falls within a predetermined reference voltage difference range, and if it falls within the range, This step is a step of issuing a status confirmation notification alarm for the battery bank in which the overvoltage protection operation has occurred.

Here, the range of the predetermined reference voltage difference is set to be greater than or equal to the first reference voltage difference but less than the second reference voltage difference.

At this time, the first reference voltage difference may be within a predetermined range of the second reference voltage difference, but may be a value corresponding to 80%, for example. The second reference voltage difference may be a value corresponding to a condition for determining the occurrence of cell unbalance protection operation among items of battery protection operation.

In other words, in one embodiment, if the voltage difference between the battery bank where the overvoltage protection operation occurred and the battery bank with the lowest voltage is equal to or higher than the predetermined range of the cell imbalance protection operation level, % or more, a status confirmation alarm is issued.

The reason for this setting is to prevent overuse of a particular battery bank due to unbalanced conditions, even before the voltage difference between battery banks has not reached the conditions for cell unbalance protection operation. This is to prevent the problem from progressing to safety issues such as rapid deterioration and heat generation and ignition.

2.5. Buffer voltage downward adjustment step (S5000)

The buffer voltage downward adjustment step (S5000) checks whether overvoltage protection operation continues to occur in the same battery bank for a first reference number of times or more after the status confirmation notification alarm is issued in the notification alarm issuing step (S4000). If this continues to occur, the buffer voltage value currently set for the battery bank is adjusted downward by a predetermined reference voltage value. When adjusting the buffer voltage downward, adopt a method in which the already set buffer voltage is adjusted downward by a predetermined reference voltage, for example, by 0.5V, or by a predetermined percentage (%). Can be done.

2.6. Battery operation permanent cutoff step (S6000)

The step of permanently shutting off the battery operation (S6000) is to check whether the overvoltage protection operation occurs more than a second reference number of times in the same battery bank after the buffer voltage is adjusted downward through the step of adjusting the buffer voltage downward (S6000). permanently cut off battery operation if this occurs.

This is despite the fact that primary abnormality measures were taken to prevent the battery bank from being overcharged when the overvoltage protection operation occurred through the notification alarm issuing step (S4000) and buffer voltage downward adjustment step (S5000). Because of the safety issue if the bank continues to experience overvoltage protection, additional measures are required to permanently shut off battery operation even before cell imbalance protection occurs. The battery is protected by taking abnormal measures to prevent safety issues from arising.

3. Battery protection system according to the present invention

The battery protection system according to the present invention includes two types of embodiments.

<Embodiment 1: Method of protecting the battery by taking abnormal measures according to the items of battery protection operation>

FIG. 3 is a diagram showing the configuration of a battery protection system according to Embodiment 1 of the present invention.

Referring to FIG. 3, the battery protection system according to the first embodiment classifies each battery protection operation item into two categories depending on whether or not there is a possibility that a safety issue will emerge. Depending on whether or not the state of occurrence of the protective operation satisfies the conditions corresponding to the classified categories described above, the above-mentioned abnormality measures are taken to prevent battery malfunctions that are actually normal but due to noise, etc. It is configured to protect the battery in a manner that complements the battery and prevents the emergence of safety issues.

3.1. Battery (not shown)

The battery of the present invention includes at least two battery banks each including a plurality of battery cells.

3.2. Status data measurement unit 100

The status data measurement unit 100 is a component that measures battery status data at regular intervals.

As mentioned above, the battery status data measured in the present invention includes the voltage and current of each battery cell, the current of the shunt resistor, the voltage across the shunt resistor, and the thermistor. The method of measuring each of these temperature values uses a known technique.

3.3. Battery protection operation generator 200

The battery protection operation generation unit 200 uses the battery status data measured by the status data measurement unit 100 to ensure that the battery status satisfies a battery protection operation generation condition preset for each battery protection operation item. It is determined whether or not the conditions are satisfied, and the battery protection operation for the items determined to be satisfied is caused.

Inducing the battery protection operation may be realized, for example, by outputting a protection operation generation signal indicating the occurrence of the battery protection operation for the item.

3.4. Battery protection operation release unit 300

The battery protection operation canceling unit 300 uses the battery status data measured by the status data measurement unit 100 to cancel the battery protection operation in advance after the battery protection operation generation unit 200 generates at least one item of battery protection operation. This is a component that determines whether or not the set conditions for canceling the battery protection operation of the item are satisfied, and if the conditions are satisfied, cancels the battery protection operation of the item that has occurred.

Canceling the battery protection operation may be realized, for example, by outputting a protection operation cancellation signal indicating cancellation of the battery protection operation for the item.

3.5. Abnormal action sufficiency condition comparison judgment unit 400

The abnormal action sufficiency condition comparison/judgment unit 400 classifies the category to which the item of the battery protection action that occurred in the battery protection action generation unit 200 belongs, and determines the abnormal action in which the occurrence state of the battery protection action corresponds to the classified category. This is a component that compares and determines whether or not the sufficiency condition is satisfied.

The abnormal action sufficiency condition comparison and determination unit 400 may include detailed components as described below.

3.5.1. Protective operation item classification section 410

The protective operation item classification unit 410 performs a task of classifying/categorizing whether the battery protective operation item generated in the battery protective operation generating unit 200 belongs to a preset first category or second category. . The protection operation items may be categorized by inputting the above-mentioned protection operation generation signals for each item.

If the item of the battery protection operation that has occurred belongs to the first category, for example, a first classification signal indicating this may be output.

On the other hand, if the item of the battery protection operation that has occurred belongs to the second category, for example, a second classification signal indicating this may be output.

3.5.2. Occurrence frequency comparison section 420

If the protective operation item classification unit 410 classifies the battery protection operation item that has occurred as belonging to the first category or the second category, the occurrence frequency comparison unit 420 compares the batteries of the same item up to the current cycle. A comparison is made to see if the cumulative number of times the protective operation has occurred is greater than or equal to a first reference number of times, and if the cumulative number of times the protective operation has occurred is greater than or equal to the first reference number of times, a number-sufficiency signal is output.

More specifically, if either one of the first and second classification signals is output from the protection operation item classification unit 410, the battery protection operation corresponding to that signal occurs up to the current cycle. It is also possible to compare whether or not the accumulated number of times has exceeded a first reference number of times, and to output a number of times sufficient signal indicating this fact if the cumulative number of times has been exceeded.

Here, the first reference number of times may be set to three times, for example.

On the other hand, the number of occurrences comparison unit 420 determines whether the battery protection operation of the item corresponding to the battery status confirmation notification alarm is performed in the battery protection operation generation unit 200 after the abnormality handling unit 500 (to be described later) provides the notification alarm for battery status confirmation. It is compared whether the number of occurrences is equal to or greater than a second reference number of times, and if the number of occurrences is equal to or greater than the second reference number, an additional number of times sufficiency signal is output.

Here, the second reference number of times may be set to, for example, two times.

3.5.3. Occurrence duration comparison section 430

The occurrence duration comparison unit 430 determines whether the occurrence state of the battery protection operation is longer than the reference time when the protection operation item classification unit 410 classifies the item of the battery protection operation that has occurred as belonging to the second category. It is checked whether the duration continues or not, and if it is, a duration sufficiency signal is output.

In other words, when the second classification signal is output from the protective operation item classification section 410, it is compared whether the occurrence state of the battery protective operation continues for a reference time or longer, and if the condition is longer than the reference time, then A duration sufficiency signal may be output to indicate this.

For example, the time period during which the battery protection operation is maintained may be obtained through the time/time point at which a protection operation cancellation signal is output from the battery protection operation cancellation unit 300 in response to the battery protection operation that has occurred. .

Here, the reference time may be set to 10 minutes, for example.

3.6. Abnormal handling department 500

When it is determined that the occurrence state of the battery protection operation satisfies the abnormality measure sufficiency condition corresponding to the classified category as a result of the judgment in the abnormality measure sufficiency condition comparison and judgment section 400, the abnormality measure unit 500 performs This is a component that takes predetermined abnormality measures corresponding to the detected category.

Such an abnormality handling unit 500 may include detailed components as described below.

3.6.1. Status confirmation notification unit 510

If the protection operation item classification unit 410 outputs the first classification signal and the occurrence count comparison unit 420 outputs the number-sufficiency signal, the status confirmation notification unit 510 determines the battery status as an abnormality measure. Provide a confirmation alert.

In other words, if the battery protection operation of the same item belonging to the first category occurs more than the first standard number of times (for example, 3 times), which may manifest as a safety problem (ignition, heat generation), the user It provides a notification alert to check the battery status.

3.6.2. Control value initialization unit 520

The control value initialization unit 520 performs a control value initialization unit 520 when the number of occurrences comparator 420 outputs a count sufficiency signal while the first classification signal is output from the protection operation item classification unit 410, or when the protection operation item classification In a state where the second classification signal is output from the section 410, when the number of occurrences comparison section 420 outputs the number of occurrences sufficiency signal and the occurrence duration comparison section 430 outputs the duration sufficiency signal, abnormal measures are taken. As a result, the battery control value currently set in the memory (RAM) is initialized to the initial battery control value.

In other words, the number of occurrences of the battery protection operation for the same item belonging to the first category, which may manifest as a safety problem (ignition, heat generation), is equal to or greater than the first standard number of times (for example, three times). or the number of occurrences of battery protection operations for items belonging to the second category that may manifest as safety problems (ignition, heat generation) is greater than or equal to the first standard number of times (e.g., 3 times) and if the battery protection operation continues for a reference time or longer in a state where the battery protection operation has occurred, the current battery control value is initialized to the initial battery control value and the battery is returned to the initial normal mode. It is.

3.6.3. Operation cutoff section 530

The operation cutoff unit 530 is configured to take an additional abnormality measure of permanently cutting off the operation of the battery when the additional count sufficiency signal is output from the occurrence count comparison unit 420.

In the case of a battery protection operation of an item belonging to the first category, the first abnormality measure is to provide a notification alarm for battery status confirmation by the status confirmation notification unit 510 and control value initialization unit 520, and to initialize the memory. If the battery protection operation of the same item continues to be performed repeatedly even after the battery protection operation of the same item is performed repeatedly, it will cause battery deterioration. When this happens, it permanently cuts off battery operation.

<Embodiment 2: Method of protecting the battery by taking abnormal measures before cell unbalance protection operation occurs>

FIG. 4 is a diagram showing the configuration of a battery protection system according to Embodiment 2 of the present invention.

Referring to FIG. 4, in the battery protection system according to the second embodiment, when an overvoltage protection operation occurs in a specific battery bank, the voltage difference between the battery bank and the battery bank with the lowest voltage satisfies the reference condition. If the battery condition is satisfied, a battery status confirmation notification is primarily provided, and measures are taken to prevent overcharging of the battery bank by lowering the buffer voltage, and if the overvoltage protection operation continues to occur in the battery bank thereafter. In addition, the battery is configured to be protected by taking a secondary measure of permanently shutting off battery operation to prevent safety issues from arising. In the case of such a system according to Embodiment 2, some of the components of the system according to Embodiment 1 described above are similarly provided, but the system may further include the components described below, or may include some of the components described below. The functions of the components may be changed and realized. Therefore, regarding the system according to Embodiment 2, explanations regarding the same configurations and functions will be omitted when compared with Embodiment 1, and the explanation will focus on the components/functions that are added or have differences. do.

3.3. Battery protection operation generator 200

The battery protection operation generation unit 200 determines whether the voltage of each battery bank satisfies preset overvoltage protection operation generation conditions based on the battery status data measured by the status data measurement unit 100 described above. In comparison, a full battery bank will cause overvoltage protection operation. For example, an overvoltage protection operation generation signal may be output. Here, the overvoltage protection operation generation signal may include an identification number that can identify the battery bank.

A battery bank in which an overvoltage protection operation has occurred may be hereinafter referred to as a battery bank in which an overvoltage protection operation has occurred.

3.4. Battery protection operation release unit 300

The battery protection operation cancellation unit 300 presets the voltage of the battery bank based on the battery status data measured after the overvoltage protection operation occurs in at least one battery bank by the battery protection operation generation unit 200. This is a component that compares whether or not the specified overvoltage protection operation cancellation conditions are satisfied, and when the conditions are satisfied, cancels the protection operation that has occurred in the battery bank. For example, an overvoltage protection operation release signal may be output.

3.5. Abnormal action sufficiency condition comparison judgment unit 400

The abnormal action sufficiency condition comparison/judgment unit 400 selects a battery bank in which an overvoltage protection operation has occurred by the battery protection operation generation unit 200 and a battery bank having the lowest voltage compared to the battery bank in which the overvoltage protection operation has occurred. It is determined whether the voltage difference between the voltage difference between the voltage difference and the voltage difference is within a predetermined reference voltage difference range, and if it is within the range of a predetermined reference voltage difference, whether or not the battery bank in which the overvoltage protection operation has occurred satisfies the abnormal condition. It is configured to make a comparative judgment.

3.5.1. Reference voltage difference range comparison unit 410

The reference voltage difference range comparison unit 410 includes a voltage difference calculation unit (a voltage difference calculation unit) that calculates a voltage difference between the battery bank in which the overvoltage protection operation has occurred and a battery bank having the lowest voltage compared to the battery bank in which the overvoltage protection operation has occurred. (not shown). Note that the voltage difference calculated by the voltage difference calculation unit (not shown) is compared to see if it falls within a predetermined reference voltage difference range, and if it falls within the range, a difference condition satisfaction signal indicating this is generated. may be output.

Here, the range of the predetermined reference voltage difference is set to be greater than or equal to the first reference voltage difference but less than the second reference voltage difference.

At this time, the first reference voltage difference may be set to a value corresponding to 80% of the second reference voltage difference.

In other words, the voltage difference between the battery bank where the overvoltage protection operation occurred and the battery bank with the lowest voltage is greater than or equal to a predetermined range of the cell imbalance protection operation level, in one embodiment, 80% or more. In this case, a differential condition satisfaction signal is output.

3.5.2. Occurrence frequency comparison unit 420

The occurrence count comparison unit 420 determines, after the difference condition satisfaction signal is output from the reference voltage difference range comparison unit 410, that the number of times the overvoltage protection operation continues to occur in the battery bank in which the overvoltage protection operation has occurred is equal to or greater than a first reference number of times. It is also possible to compare whether or not the number is present, and if the number is greater than or equal to the number, output a number-of-times sufficiency signal.

Here, the first reference number of times may be set to three times, for example.

On the other hand, the occurrence number comparison unit 420 compares whether the number of times the overvoltage protection operation continues to occur in the battery bank is equal to or greater than a second reference number after the buffer voltage is adjusted downward by the buffer voltage adjustment unit 520, which will be described later. In this case, an additional number-of-times sufficiency signal may be output.

Here, the second reference number of times may be set to, for example, two times.

3.6. Abnormal handling department 500

The abnormality measure unit 500 is configured to take a corresponding predetermined abnormality measure when it is determined that the abnormality measure sufficiency condition comparison and determination unit 400 satisfies the condition.

3.6.1. Status confirmation notification unit 510

The status confirmation notification unit 510 uses the voltage difference between the battery bank in which the overvoltage protection operation has occurred and the battery bank having the lowest voltage as compared to the battery bank in which the overvoltage protection operation has occurred from the reference voltage difference range comparison unit 410 as a reference. When a differential condition satisfaction signal indicating that the voltage is within the range of the voltage difference is output, an alarm to confirm the battery status is provided as an abnormality measure.

3.6.2. Buffer voltage adjustment section 520

The buffer voltage adjustment unit 520 outputs a number-satisfaction signal from the number-of-occurrence comparison unit 420 indicating that the overvoltage protection operation has occurred for a first reference number of times or more in the battery bank in which the overvoltage protection operation has occurred, which corresponds to the differential condition satisfaction signal. In this case, as an abnormality measure, the buffer voltage value currently set for the battery bank is adjusted downward by a predetermined reference voltage value.

When adjusting the buffer voltage downward, for example, a downward signal of the buffer voltage may be output.

3.6.3. Operation cutoff section 530

The operation cutoff unit 530 outputs an additional number of times sufficiency signal indicating that the overvoltage protection operation has further occurred a second reference number of times in the battery bank whose buffer voltage has been adjusted downward from the number of occurrences comparison unit 420, It is configured to take additional abnormal action to permanently interrupt battery operation.

In the case where the overvoltage protection operation continues to occur in the battery bank even though the state confirmation notification unit 510 and the buffer voltage adjustment unit 520 have taken primary abnormality measures to prevent overcharging of the battery bank in which the overvoltage protection operation has occurred. Due to concerns about safety issues, additional abnormal measures are taken to permanently cut off battery operation even before the cell's unbalanced protection operation occurs. This protects the battery by preventing safety issues from becoming apparent.

The components according to Embodiment 1 or Embodiment 2 as described above may be implemented in a main integrated circuit (Main IC) that controls battery operation.

On the other hand, although the technical idea of the present invention has been specifically described based on the above embodiments, it should be noted that the above embodiments are for explanation thereof and are not for limitation thereof. Should. Note that those skilled in the technical field of the present invention should be able to understand that various embodiments can be implemented within the scope of the technical idea of the present invention.

The meanings of the symbols used in the description of the present invention and in the drawings are as follows.

100: Status data measurement section 200: Battery protection operation generation section 300: Battery protection operation cancellation section 400: Abnormal action sufficiency condition comparison and judgment section 410: Protection operation item classification section 420: Occurrence frequency comparison section 430: Occurrence duration comparison section 500 : Abnormality handling section 510: Status confirmation and notification section 520: Control value initialization section 530: Operation cutoff section

Claims (24)

a state data measurement step of measuring battery state data at regular intervals;
Using the battery status data measured in the status data measurement step, it is determined whether the battery status satisfies a protective operation occurrence condition set in advance for each battery protective operation item, and it is determined that the condition is satisfied. a protective operation generating step for causing a battery protective operation of the item that has been
Whether or not a preset condition for canceling the protective operation of the generated item is satisfied using battery status data measured after the battery protective operation of at least one item occurs in the protective operation generating step. a protective operation canceling step of determining and, if satisfied, canceling the protective operation that has occurred so that the battery operates in a normal operating mode;
Classify the category to which the item of the protective operation that occurred in the protective operation generation step belongs, and determine whether or not the occurrence state of the protective operation satisfies the abnormal action sufficiency condition corresponding to the classified category. an abnormality action step for taking a predetermined abnormality action corresponding to the category when it is determined that
How to protect your battery, including: The abnormality action step includes:
a classification step of classifying to which of the first and second categories the item of the protective action occurring in the protective action generating step belongs;
In the classification step, after classifying the category to which the item of the protective action that has occurred is classified, it is determined whether the occurrence state of the protective action that has occurred satisfies the abnormality measure satisfaction condition corresponding to the classified category. a step of determining whether the measures are satisfied;
an abnormality action step for taking a predetermined abnormality measure corresponding to the category if it is determined that the abnormality measure is satisfied as a result of the judgment in the step of determining whether or not the abnormality measure is satisfied;
The method for protecting a battery according to claim 1, further comprising: In the step of determining whether or not abnormal measures are satisfied,
If the item of the protective operation that has occurred belongs to the first category, a frequency comparison step of comparing whether the number of times that the protective operation of the item has occurred up to the current cycle is equal to or greater than a first reference number of times; and if the number of occurrences is equal to or greater than a first standard number of times, it is determined that the abnormality measure satisfaction condition corresponding to the first category is satisfied;
If the item of the protective operation that has occurred belongs to the second category, an occurrence frequency comparison step of comparing whether the number of times that the protective operation of the item has occurred up to the current cycle is equal to or greater than a first reference number of times; , a step of confirming whether or not the occurrence of the protective operation continues for a reference time or longer, and the number of occurrences is equal to or more than the first reference number of times, and the occurrence state of the protective operation is confirmed. 3. The battery protection method according to claim 2, wherein it is determined that an abnormality measure satisfaction condition corresponding to the second category is satisfied when the condition continues for a reference time or longer. In the abnormality action step,
a notification alarm providing step for providing a notification alarm for battery status confirmation when it is determined that the item of the protective operation that has occurred satisfies the abnormality measure sufficiency condition corresponding to the first category; a control value initialization step of initializing the control value to an initial battery control value;
An initial control value that initializes the battery control value currently set in the memory to the initial battery control value when it is determined that the protective action item that has occurred satisfies the abnormality measure sufficiency condition corresponding to the second category. 4. The method for protecting a battery according to claim 3, further comprising performing a step of converting the battery. An additional abnormality that permanently cuts off battery operation if the same protective operation occurs more than a second reference number of times after performing the notification alarm providing step and control value initialization step in the abnormality action operation step. 5. The battery protection method according to claim 4, further comprising the step of taking action. The first category is a category to which items of protective operation that may manifest as safety issues including heat generation and ignition belong,
Claims 2 and 3, characterized in that the second category is a category to which items of protective operation that are unlikely to manifest as safety issues including heat generation and ignition belong. The method for protecting a battery according to claim 4. a state data measuring step of measuring state data of a battery including at least two or more battery banks at regular intervals;
Based on the battery status data measured in the status data measuring step, it is compared whether the voltage of each battery bank being charged satisfies a preset overvoltage protection operation occurrence condition, and the battery bank that satisfies the condition is determined. a step of generating a battery protection operation for causing an overvoltage protection operation;
A bank voltage for calculating a voltage difference between a battery bank in which an overvoltage protection operation has occurred in the battery protection operation generation step and a battery bank having the lowest voltage compared to the battery bank in which the overvoltage protection operation has occurred. a difference calculation step;
It is compared whether or not the voltage difference calculated in the bank voltage difference calculation step is within a predetermined reference voltage difference range, and if it is, a status confirmation notification alarm is issued for the battery bank in which the overvoltage protection operation has occurred. a notification alarm issuing step for issuing an alarm;
After issuing the status check notification alarm in the notification alarm issuing step, it is checked whether the overvoltage protection operation continues to occur in the battery bank for a first reference number of times or more, and if the overvoltage protection operation continues to occur, the battery bank a buffer voltage downward adjustment step of adjusting the currently set buffer voltage value downward by a predetermined reference voltage value or by a predetermined ratio (%) of the currently set buffer voltage value;
How to protect your battery, including: After adjusting the buffer voltage downward through the buffer voltage downward adjustment step, it is checked whether the overvoltage protection operation continues to occur in the battery bank for more than a second reference number of times, and if it continues to occur, the operation of the battery is permanently stopped. 8. The method of protecting a battery according to claim 7, further comprising the step of permanently shutting off battery operation. 8. The battery protection method according to claim 7, wherein the range of the predetermined reference voltage difference is set to be greater than or equal to a first reference voltage difference but less than a second reference voltage difference. The first reference voltage difference is a value corresponding to 80% of the second reference voltage difference,
10. The battery protection method according to claim 9, wherein the second reference voltage difference is a value corresponding to a criterion for determining whether a cell unbalance protection operation has occurred. a state data measurement unit that measures battery state data at regular intervals;
Using the battery status data measured by the status data measurement unit, it is determined whether the battery status satisfies a protective operation occurrence condition set in advance for each protective operation item, and it is determined that the condition is satisfied. a battery protection operation generating unit that generates a battery protection operation of the item;
Using battery state data measured after the battery protection operation generation unit generates a protection operation for at least one item, it is determined whether a preset protection operation cancellation condition for the item is satisfied. and a battery protection operation canceling unit that cancels the battery protection operation of the generated item when the above conditions are satisfied;
Classifying the category to which the item of the battery protection operation occurring in the battery protection operation generation unit belongs, and comparing and determining whether the occurrence state of the protection operation satisfies the abnormality measure sufficiency condition corresponding to the classified category. Abnormal measures sufficiency condition comparison and judgment department,
As a result of the judgment in the abnormal action sufficiency condition comparison and judgment section, if it is determined that the occurrence state of the battery protection operation satisfies the abnormal action sufficiency condition corresponding to the classified category, the predetermined condition corresponding to the classified category is determined. an abnormality measures department that takes abnormal measures;
Battery protection system with. The abnormal measure sufficiency condition comparison and judgment unit,
protection for classifying whether or not the item of the protective action occurring in the battery protective action generating section belongs to a preset first or second category, and outputting a first or second classification signal; an operation item classification section;
If either one of the first and second classification signals is output from the protection operation item classification section, the number of times the protection operation has occurred for the item up to the current cycle is equal to or greater than the first reference number of times. an occurrence number comparison unit that compares whether or not the number of occurrences is equal to or less than the number of occurrences, and outputs a number of occurrences sufficiency signal when the number of occurrences is equal to or greater than the number of occurrences;
When the second classification signal is output from the protective operation item classification section, it is compared whether the occurrence state of the protective operation of the item lasts for a reference time or more, and if it is, a duration sufficiency signal is generated. an occurrence duration comparison section that outputs
The battery protection system according to claim 11, characterized in that it comprises: The abnormality handling department is
a status confirmation notification unit that provides a notification alarm for battery status confirmation when a number-sufficiency signal is output from the number-of-occurrence comparison unit while a first classification signal is output from the protective operation item classification unit;
While the first classification signal is output from the protective operation item classification section, the occurrence count comparison section outputs a count sufficiency signal, or the protection operation item classification section outputs a second classification signal. In this state, when the number of occurrences comparator outputs a sufficient number of occurrences signal and the occurrence duration comparator outputs a sufficient duration signal, the battery control value currently set in the memory is used as the initial battery control value. a control value initialization unit that initializes the value to a value;
13. The battery protection system according to claim 12, comprising: The occurrence frequency comparison unit determines whether or not the number of times a protective operation occurs for the item is equal to or greater than a second reference number of times after the battery status confirmation alarm is provided by the status confirmation alarm unit of the abnormality handling unit. 14. The battery protection system according to claim 13, wherein the battery protection system outputs an additional number of sufficiency signals when the number of times is equal to or greater than the number of times. The abnormality handling department is
15. The battery protection system according to claim 14, further comprising an operation cutoff section that permanently cuts off operation of the battery when the additional number of occurrences sufficiency signal is output from the occurrence number comparison section. The first category is a category to which items of protective operation that may manifest as safety issues including heat generation and ignition belong,
13. The battery according to claim 12, wherein the second category is a category to which items of protective operation that are unlikely to manifest as safety issues including heat generation and ignition belong. protection system. a state data measurement unit that measures state data of a battery including at least two or more battery banks at regular intervals;
Based on the battery status data measured by the status data measurement unit, it is compared whether the voltage of each battery bank satisfies a preset overvoltage protection operation generation condition, and overvoltage protection is applied to the battery bank that satisfies the overvoltage protection operation occurrence condition. a battery protection operation generating section that generates the operation;
A voltage difference between a battery bank in which an overvoltage protection operation has occurred and a battery bank having the lowest voltage compared to the battery bank in which an overvoltage protection operation has occurred by the battery protection operation generation unit is a predetermined reference voltage. an abnormality measure sufficiency condition comparison and judgment unit that compares whether or not the difference falls within the range of the difference and, if it falls within the range, determines whether the battery bank in which the overvoltage protection operation occurred satisfies the abnormality measure sufficiency condition; ,
an anomaly action unit configured to take a corresponding predetermined abnormal action if it is determined that the abnormal action sufficiency condition is satisfied as a result of the judgment in the abnormal action sufficiency condition comparison and judgment unit;
Battery protection system with. The voltage of the battery bank satisfies a preset protection operation cancellation condition based on battery status data measured after the overvoltage protection operation is generated in at least one battery bank by the battery protection operation generation unit. 18. The battery protection system according to claim 17, further comprising a battery protection operation canceling unit that compares whether the conditions are satisfied and cancels the protection operation that has occurred in the battery bank when the conditions are satisfied. The abnormal measure sufficiency condition comparison and judgment unit,
Compare whether or not a voltage difference between the battery bank in which the overvoltage protection operation has occurred and a battery bank having the lowest voltage compared to the battery bank in which the overvoltage protection operation has occurred is within a predetermined reference voltage difference range. a reference voltage difference range comparison unit that outputs a difference condition satisfaction signal when the difference is within the range;
After the difference condition satisfaction signal is output from the reference voltage difference range comparator, it is compared whether the number of times that the overvoltage protection operation continues to occur in the battery bank in which the overvoltage protection operation has occurred is equal to or greater than a first reference number of times. , an occurrence number comparison unit that outputs a number sufficiency signal when the number of occurrences is greater than or equal to ,
18. The battery protection system according to claim 17, comprising: The abnormality handling department is
a status confirmation notification unit that provides a battery status confirmation notification alarm when a difference condition satisfaction signal is output from the reference voltage difference range comparison unit;
a buffer voltage adjustment unit that adjusts a buffer voltage value currently set for the battery bank downward by a predetermined reference voltage value when the number of occurrences sufficiency signal is output from the number of occurrences comparison unit;
20. The battery protection system according to claim 19, comprising: The occurrence number comparison unit is
After the buffer voltage adjustment unit downwardly adjusts the buffer voltage, it is compared whether the number of times the overvoltage protection operation continues to occur in the battery bank is equal to or higher than a second reference number of times, and if the number of times is equal to or higher than the second reference number, an additional number of times is determined. The battery protection system according to claim 20, characterized in that the battery protection system outputs a sufficiency signal. The abnormality handling department is
22. The battery protection system according to claim 21, further comprising an operation cutoff section that takes additional abnormality measures to permanently cut off operation of the battery when the additional number of occurrences sufficiency signal is output from the occurrence number comparison section. 20. The battery protection system according to claim 19, wherein the range of the predetermined reference voltage difference is set to be greater than or equal to a first reference voltage difference but less than a second reference voltage difference. The first reference voltage difference is a value corresponding to 80% of the second reference voltage difference,
24. The battery protection system according to claim 23, wherein the second reference voltage difference is a value corresponding to a criterion for determining whether an unbalanced cell protection operation has occurred.